APA (7th ed.) Citation

Michael Zeilik., S. A. G. (1979). Introductory Astronomy & Astrophysics. University of Illionis.

Chicago Style (17th ed.) Citation

Michael Zeilik., Stephen A. Gregory. Introductory Astronomy & Astrophysics. University of Illionis, 1979.

MLA (8th ed.) Citation

Michael Zeilik., Stephen A. Gregory. Introductory Astronomy & Astrophysics. University of Illionis, 1979.

Warning: These citations may not always be 100% accurate.